Open the direct chat with the user you want to delete.

Click on [Delete from your contact] from the [Gear] button on the right side of the chat screen.

 

A confirmation pop-up screen will be displayed,
Click and select [ Delete ], and the user can be deleted from your contacts.

 

 

・When a contact is deleted, your direct chat history with the other user is deleted as well, so use caution.
・Contacts among users in the organization cannot be deleted.